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307 hardened steel pan machine screws products are offered for sale by suppliers on Alibaba.com, of which screws accounts for 91%. A wide variety of hardened steel pan machine screws options are available to you, such as black oxide, silver plated and chrome plated.You can also choose from stainless steel, carbon steel and ss304 hardened steel pan machine screws,As well as from zinc plated, plain hardened steel pan machine screws, and whether hardened steel pan machine screws is iso, gb, or ansi.